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PURBiochar, 2022MexicoGeneral Methodologyv2.0

General Biochar Systems - Irapuato

PUR-644638 ↗

#11of 44 in Biochar#7of 27 in Mexico#21of 109 in Puro.earth (PUR)

5.3/ 10
Integrity
5.5
Transparency
5.0
Claim Safety
5.0
Documentation
6.0

Audit Analysis

The Irapuato biochar project has a VVB-confirmed additionality assessment and no reversal events, but suffers from a project-specific baseline, no stated buffer pool or leakage treatment, and five material findings that highlight significant gaps in batch-level data reconciliation, metering, and laboratory testing. The verified ERR matches the claimed figure exactly for the same monitoring period, so there is no over-crediting signal, but the underlying data-quality weaknesses limit confidence in the precision of the credit quantity.

Red Flags

  • Five material findings in the verification report flag aggregated batch data, inconsistent bespoke emissions factors, absence of dedicated meters for diesel/LPG/electricity, and a single laboratory report covering the entire reporting period.
  • No buffer pool percentage is stated in any available document, leaving permanence risk unquantified despite biochar's inherent stability.
  • Leakage deduction and justification are both absent from the extracted record, meaning no leakage treatment has been documented for a project where feedstock sourcing and displaced soil carbon could be relevant.
  • Three corrective actions are required, indicating the VVB identified monitoring and record-keeping deficiencies that have not yet been resolved.

Credit Vintages Exhausted

IssuedRetiredAvailable
2024
1081080
Total1081080

Risk Indicators

Additionality

VVB-confirmed combined test

Permanence

Inherently stable but no buffer pool stated

Leakage

No deduction or justification documented

Baseline

Project-specific, reassessment timing not stated

Safeguards

Mentioned but FPIC and grievance mechanism not detailed

Double-claim

CORSIA and CCP status both not stated

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Analysis ProvenanceScored2026-08-19General Methodology v2.0

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